Question

do you think the egg will be done faster if the heat is kept on high as the water boils?
explain your answer.
gizmo warm-up
in the phase changes gizmo, select micro view and set the ice volume to 25 cm³. notice the nitrogen ( ), oxygen ( ), and water ( ) molecules.
to start, create ice. set add/remove heat energy to -200 j/s, click play ( ), and then click pause ( ) when the container is about half ice, half water. set add/remove heat energy back to 0 j/s, and then click play.

1. observe water molecules in the solid (ice), liquid (water), and gas (air) phases.

a. in which phase(s) do molecules move freely?
b. in which phase(s) are molecules held together?
c. what do you notice about the positions of the ice molecules?

1. click reset ( ), and select macro view. set the ice volume to 25 cm³.

Explanation:

Part A:

Step1: Recall phase properties

In gas phase, molecules have high kinetic energy, move freely. In liquid, molecules can slide, move more freely than solid. Solid (ice) has fixed positions, molecules vibrate. So gas and liquid phases have molecules moving freely.

Step2: Confirm with phase behavior

Gas (air - water vapor etc.) and liquid (water) molecules aren't in fixed positions, move freely. Solid (ice) molecules are held in a lattice, move less freely. So phases with free - moving molecules: liquid and gas.

Step1: Recall intermolecular forces

In solid (ice) and liquid (water), intermolecular forces (like hydrogen bonds in water) hold molecules together. In gas, molecules are far apart, weak forces. So solid (ice) and liquid (water) phases have molecules held together.

Step2: Verify with phase structure

Solid (ice) has a rigid structure, molecules held in place. Liquid (water) has molecules close, held by forces (though less than solid). Gas molecules are dispersed, not held together strongly. So phases: solid (ice) and liquid (water).

Step1: Observe solid (ice) structure

In solid (ice), molecules are arranged in a regular, repeating pattern (crystalline structure). They are in fixed positions relative to each other, forming a lattice - like arrangement.

Step2: Describe the observation

The ice molecules are in a fixed, ordered arrangement (crystalline lattice), with each molecule having a relatively stable position and vibrating around that position rather than moving freely.

Answer:

Liquid (water) and gas (air) phases.

Part B: